Quote: A 410 inch engine at 7500 rpm would need a 14x4 air filter. A 500 inch engine at 7500 rpm needs a 14x5 filter. I've used 14x5 and 14x6 filters on the dyno with 500 inches and a 1250 Dominator and there is no restriction. But it is hard to fit that large of a filter under a hood unless you use an extra tall 6 pack style.
Well, I don't rev my 500 to 7500, at least not intentionally My Wix Racing 16x3.5 equates to a 14x4 and shows no restriction to 7000 but I expect the Wix racing media flows better than the K&N. Going to a 16" filter helps overcome some of the geometric difficulties of a close carb-to-hood space, especially with a Dominator. I'd been wanting to delete the scoop for years and finally got around to it last winter. Still have to paint the hood to match the rest of the car. No loss in performance shows tall isn't necessary, just the easiest route.
My Wix Racing 16x3.5 equates to a 14x4 and shows no restriction to 7000 but I expect the Wix racing media flows better than the K&N. Going to a 16" filter helps overcome some of the geometric difficulties of a close carb-to-hood space, especially with a Dominator. I'd been wanting to delete the scoop for years and finally got around to it last winter. Still have to paint the hood to match the rest of the car. No loss in performance shows tall isn't necessary, just the easiest route.